chip: EM4305 Frequency: 100~150KHz Protocol tandard: ISO11784, ISO11785, ISO FDX-B Work mode: R/W R/W distance: 2~10cm R/W time: 1-2ms Size: Φ20mm / 25mm / 30mm, dik 1 ~ 4 mm (of die aangewese grootte ) werk temperatuur: -20℃~+85℃ Erasable times: >100,000 times Data Storage: >10 years Materials and production process: PVC, dop inkapseling chips en spoel, ultrasonic welding International protection agreement: IP67/IP68 Weight: 1~ 4g